ABA crosstalk with ethylene and nitric oxide in seed dormancy and germination

These results suggest that Nitric oxide reduces both abscisic acid accumulation and sensitivity

Erwann Arc

2013

Scholarcy highlights

  • Survival of plant species mainly relies on the sexual reproduction to give birth to new individuals
  • A dormant state is induced during the maturation phase, preventing pre-harvest germination and allowing seed survival until environmental conditions become suitable for germination and seedling establishment
  • Key genes encoding enzymes of the abscisic acid biosynthesis pathway have been identified through mutant selection for altered germination phenotypes, giving further evidence of the major role of ABA in the regulation of seed dormancy and germination
  • SPATIOTEMPORAL REGULATION OF ABA LEVEL AND SIGNALING IN DORMANCY AND GERMINATION Abscisic acid is produced in all seed tissues, as suggested by the spatiotemporal expression of ABA biosynthesis genes
  • Significant advances have been recently obtained in the understanding of the ABA and ethylene metabolism and signaling pathways
  • It would be important to discriminate the hierarchy among these signaling pathways, identify major regulatory nodes and determine whether the environmental factors, which regulate germination and dormancy, modulate this hierarchy

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